Stop-motion for jacquard looms.



J. V. DESMARAIS.

STOP monou FOR JACQUARD LOOMS.

APPLICATION FILED JULYIB. 1915- Patented Sept. 19, 1916.

2 SHEETS-SHEET I.

J. V-. DESMARAIS.

STOP MOTION FOR JACQUARD LOOMS.

APPLICATION FlLED1ULYl'9.l915.

1 1 98,706 Patented Sept. 19, 1916.

2 SHEETSSHEET 2.

Suva WM Qttomu s UNITED STATES PATENT OFFICE.

JOSEPH V. DESMARAIS, OF NEW BEDFORID, MASSACHUSETTS.

STOP-MOTION FOR JACQUARD LOOMS.

Application filed July 19, 1915.

To all whom it may concern:

Be it known that I, JOSEPH V. DEsMARAIs, a citizen of the United States, and resident of New Bedford, county of Bristol, State of Massachusetts, have invented certain new and useful Improvements in Stop-Motions for Jacquard Looms, of which the following is a specification.

My invention relates to stop mechanisms for looms, particularly looms using drop box mechanisms for weaving in colors and which employ jacquard or dobby heads.

It sometimes happens in the operation of looms which use jacquard or dobby heads to weave patterns in the cloth and which also use a drop box color mechanism to vary the color of the woof threads, that the two mechanisms do not properly act together. Thus the pattern or chain controlling the drop box color mechanism may be ahead or behind the corresponding jacquard cards or dobby chains of cards.

When the loom is working correctly each card in the head of the machine comes into operative position simultaneously with a card or portion of a chain which will cause the drop box color mechanism to so operate that the woof thread of proper color is thrown through the shed. If the head patterns for any reason do not cooperate with the color mechanism, as when one set of patterns is ahead or behind the other, the wrong color may be woven into the cloth and unless the defective weave is immediately noticed by the attendant and the loom stopped and the cards properly rearranged, the loom will continue to operate in this way to the detriment of the product.

The object of my invention is to provide a simple, inexpensive, and efficient means for stopping the loom when, for any reason, the apparatus for selecting the woof thread does not select the proper color.

Another object is to prevent the loom from being started on wrong pick. WVhen' my invention is applied to a loom it is impossible for an attendant to start it unless the head cards are in proper relation to the box cards 0r chains.

Other objects and uses will be apparent as the invention is more fully described.

Referring to the drawings, Figure l is a diagrammatic representation of a loom with jacquard head and color box chains, and showing the essential features of one form of my stopping device; Fig. 2 is a representa- Specification of Letters Patent.

Patented Sept. 19, 1916.

Serial No. 40,763.

tion of a jacquard cylinder and cards showlng a detail of one form of my loom stopplng device; Fig. 3 is a side elevation of a port on of a dobby head showing the manner in which the stopping device is applied thereto; Fig. 4 is a perspective view of the frame of a loom with part of my special stopplng device mounted on the side thereof instead of underneath, as in Fig. 1; Fig. 5 is an end elevation of part of a loom showing one form of my invention in which the shuttle boxes are connected to the stop mechanlsm; Fig. 6 is a view of the special jacquard needle used in one form of my stop mechanism.

In the drawings the various parts are represented by difi'erent numerals and each numeral represents the same part of the mechanlsm in the difierent views.

Referring to Fig. 1, the frame 10 of the loom is of usual construction and carries the usual stopping shaft 11 which may be manually actuated by one or more levers 12, and on this shaft I secure an arm 13.

My invention provides for automatically actuating the shaft 12 and stopping the loom when the loom mechanism picks the wrong shuttle or color. The bracket 14 is arranged on the frame 10 and has pivoted thereto by means of the bolt 14 two bell crank levers 15 and 16. A wire, cord or link 17 connects one arm of lever 16 tothe end of the arm 18 so that when the lever 16 is rocked on its pivot, to the right (Fig. 1) the shaft 11 will be actuated to stop the loom.

On the other arm of lever 16 is pivoted a smaller lever or dog 18 from which a tooth 19 projects downwardly. Levers 15 and 18 are in the same plane and'when the lever 18 is depressed slightly the tooth 19 can be engaged by the end of bell crank lever 15 if the latter is swung on its pivot. The lever 18 is normally depressed by gravity so that the tooth 19 is in the path of one end of bell crank lever 15. To the end of dog 18 is attached a wire or cord 20 which passes over pulleys 21 and 22 and is attached to one end of a lever 23 having a fixed fulcrum at 2-1 adjacent the box chain cylinder. The weight of both of the levers l8 and 23 tends to hold the lever 28 against the box chain 25 which controls the operation of the color boxes in the usual manner.

Projections or lugs 26 are provided on the chain 25 and adapted to engage the lever 23 to raise the same as the chain passes around the cylinder 27. Whenever the lever 23 is raised in this manner the cord or wire 20 is pulled and lever 18 is lifted so that the tooth 19 is out of the path of end of lever15.

The lever 15 is weighted so as to have a normal tendency to turn to the left (Fig. 1) on the pivot lt. To the left end of the lever 15 is attached a cord or wire 28 having its upper end connected to one of a pair of jacquard hooks 29 and 30. These hooks may be the special hooks on the outside of the head, which are provided in some looms to operate the, box chains and are controlled by a needle 31 of the usual type which cooperates with the pattern cards 32. Instead of actuating the hooks 29 and 30 by means of the needle 31, a spe cial needle 33 may be provided which also engages the hooks 29 and 30 and controls them in their coaction with the griffs 3 1.

The special needle 33 is not within the regular jacquard head but is outside and can only engage the hooks 29 and 30 because of a deep bend 33 in the needle. The needle 33 may be actuated in the same manner as the regular jacquard needles and may cooperate with special holes cut in the ends of the pattern cards but preferably this needle cooperates with special holes 32.

When the special needle 33 enters the hole 32 in the face of the cylinder 35, the hooks 29 and 30 are thrown forward and are raised by the griff blades 34 in the usual manner. The cord or wire 28 is thereby drawn upward and the lever 15 rocked on its pivot 14. If lever 23 has been raised at the same instant by one of the lugs 26 on the box chain 25, so as to lift the dog 18, the end of the lever 15 will miss the tooth 19 and the lever 16 will not be actuated. If, for any reason, a lug 26 on the box chain does not arrive in position to raise the lever 23 and dog 18 simultaneously with the actuation of the lever 15 the end of lever 15 will engage tooth 19 of dog 18 and cause lever 16 to be actuated, thereby pulling down arm 13 and actuating shaft 11 to stop the loom.

The acquard cylinder 35 may have a hole in only one face or a hole in each of two opposite faces and the spacing of the lugs 26 on the box chain corresponds with the arrangement of the special holes in the cylinder.

It will be apparent from the foregoing that the loom will be stopped as soon as the cylinder 35 gets out of proper step with the box chain 25. The loom cannot be started on the wrong pick of color such as would occur if the attendant has not set the pattern cards and the box chain in proper relation and, even if the loom is properly set and started, but, for anv reason, the cylinder 35 gets out of time with the box chain, it is immediately stopped.

reason that the cards must have the extra hole cut in them and also because the ends of the cards are sometimes used to work the indication of the loom.

Fig. 3 shows part of a common form of dobby head with a cord 37 attached to the harness lever 33. The lower end of cord 37 is attached to bell crank lever 15, as in the case shown in Fig. 1.

In Fig. a my stop mechanism is shown attached to the side of a loom instead of underneath. The lever 16 is actuated by lever 15 through dog 18 to pull cord l7 the same as in Fig. 1. A bell crank lever 39 mounted on a small bracket 40 secured to the side of the loom, will, when actuated by cord 17 push shipper lever 41 out of the notch 12 into the slot 43. The shipper 41 is a type that is in common use on certain makes of looms and when pushed out of notch 42 is thrown longitudinally of slot 4:3 to stop the loom.

When no box chains are used on a drop box loom the stopping device is arranged as in Fig. 5. In this form the color boxes are mounted on vertical rods 15 pivoted at their lower ends to arms 46 of a rock shaft 4-7. The color boxes are moved up and down bv the rocking of shaft 4-7. A cord 2O transmits this motion from the arm 46 to the dog 18". The box raising and lowering mechanism is so arranged that, on every second or fourth pick, the boxes are brought back to the lowest position so that the uppermost shuttle is in position to be thrown. Only when the boxes are in this lowest position is the dog 13 raised out of the path of lever 15". If the lever 15 is actuated, by the head when the boxes are not in the lowest position, it will engage dog 18 and the bell crank lever 16 will be rocked and the loom stopped.

Having described my invention what I claim and desire to secure by Letters-Patent is,

1. In a loom, the combination of means for stopping and starting the operation thereof, a plurality of shuttles, mechanism for automatically placing any desired shuttle in position to be thrown, mechanism for selecting and lifting the warp threads, said mechanisms operating in synchronism to produce a given design, and means coacting with each of said mechanisms and connected with said means, whereby the latter is actuated when the desired synchronism be tween said mechanisms is destroyed.

2. In a loom, the combination of means for starting and stopping the operation thereof, a plurality of shuttles, mechanism for selecting the shuttle to be thrown, mechanism for selecting and lifting the warp threads, said mechanisms cooperating with each other to produce a given design, a normally stationary lever connected to said means, a periodically moving lever actuated by the warp thread lifting mechanism, and a member operated by said shuttle selecting mechanism and adapted to operatively connect said levers when the cooperative relationship between said mechanisms is destroyed.

3. In a loom, the combination of means for starting and stopping the operation thereof, a plurality of shuttles, mechanism for selecting any shuttle desired to be thrown, mechanism for selecting and lifting the warp threads, said mechanisms cooperating with each other to produce a given design, a normally stationary lever operatively connected to said means, a periodically moving lever actuated by said warp lifting mechanism, a dog pivoted to said first-mentioned lever normally in the path of said second mentioned lever, said dog being operatively connected to said shuttle selecting mechanism whereby the dog is normally moved out of the path of the second mentioned lever in time with the actuation of the latter.

4. In a loom, the combination of means for starting and stopping the operation thereof, a plurality of shuttles, mechanism for automatically selecting the shuttle to be thrown, mechanism for selecting and lifting the warp threads, said mechanisms cooperating with each other to produce a given design, a normally stationary lever operatively connected to the stopping mechanism, a periodically moving lever actuated by the warp lifting mechanism, a dog carried by one of said levers and normally in position to engage the other lever, said dog being operatively connected to said shuttle selecting mechanism whereby the dog is periodically moved out of its normal position in timed relation to the movements of said periodically moving lever so as to normally avoid actuating said stationary lever.

5. In a loom, the combination of means for starting and stopping the operation thereof, a plurality of shuttles, mechanism for automatically selecting the shuttle to be thrown, mechanism for selecting and lifting the warp threads, said mechanisms cooperating with each other to produce a given design, and means comprising a lever connected to said stopping means, a lever movable relatively thereto and operatively connected to said selecting and lifting mechanism, and a member operated by said shuttle selecting mechanism, whereby said second mentioned lever is operatively connected to said first mentioned lever to move the same to actuate said stopping means, when the cooperative relationship between said mechanisms is destroyed.

6. In a loom, the combination of means for starting and stopping the operation thereof, a plurality of shuttles, mechanism for automatically selecting the shuttle to be thrown, jacquard mechanism for selecting and lifting the warp threads, said mechanisms cooperating with each other to produce a given design, a normally stationary member operatively connected with said means, means periodically actuated by said jacquard mechanism, a member adapted toform a connection between the last mentioned means and the first mentioned member, and means whereby the last mentioned member is periodically operated in timed relation to the last mentioned means to normally prevent the actuation of the first mentioned member thereby.

7. In a loom, the combination of means for starting and stopping the operation thereof, a plurality of shuttles, mechanism for automatically selecting the shuttle to be thrown, jacquard mechanism, a member operatively connected with said means, a special needle in said jacquard mechanism, periodically actuated means controlled by said special needle and adapted to be operatively connected with said member to actuate the first mentioned means and means periodically actuated by the first mentioned mechanism in timed relation to the actuation of said last mentioned means, means whereby the actuation of said member is normally prevented.

In testimony whereof I affix my signature.

JOSEPH V. DESMARAIS.

WVitnesses JAMES P. DORAN, DAISY L. PUTZ.

fiopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. G. 

